package com.ljx.qqpro.websocket;

import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArraySet;

import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.json.JSONUtil;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.ljx.qqpro.entity.ChatEntity;
import com.ljx.qqpro.entity.ChatUserEntity;
import com.ljx.qqpro.service.ChatRecordService;
import com.ljx.qqpro.service.ChatService;
import com.ljx.qqpro.service.ChatUserService;
import com.ljx.qqpro.vo.message.Message;
import com.ljx.qqpro.vo.message.MessageChatList;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Component;

import lombok.extern.slf4j.Slf4j;

/**
 * 聊天
 */
@Component
@Slf4j
@ServerEndpoint("/chat/{userId}/{chatId}")
public class ChatWebSocket {

    public static ChatService chatService;

    public static ChatUserService chatUserService;

    public static ChatRecordService chatRecordService;

    //与某个客户端的连接会话，需要通过它来给客户端发送数据
    private Session session;
        /**
     * 用户ID
     */
    private String userId;

    //concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。
    //虽然@Component默认是单例模式的，但springboot还是会为每个websocket连接初始化一个bean，所以可以用一个静态set保存起来。
    //  注：底下WebSocket是当前类名
    private static CopyOnWriteArraySet<ChatWebSocket> chatWebSockets =new CopyOnWriteArraySet<>();
    // 用来存在线连接用户信息
    private static ConcurrentHashMap<String,Session> sessionPool = new ConcurrentHashMap<String,Session>();

    /**
     * 链接成功调用的方法
     */
    @OnOpen
    public void onOpen(Session session, @PathParam(value="userId") String userId) {
        try {
			this.session = session;
			this.userId = userId;
			chatWebSockets.add(this);
			sessionPool.put(userId, session);
			log.info("【websocket消息】有新的连接，总数为:"+ chatWebSockets.size());
		} catch (Exception e) {
		}
    }

    /**
     * 链接关闭调用的方法
     */
    @OnClose
    public void onClose() {
        try {
			chatWebSockets.remove(this);
			sessionPool.remove(this.userId);
			log.info("【websocket消息】连接断开，总数为:"+ chatWebSockets.size());
		} catch (Exception e) {
		}
    }

    /**
     * 收到客户端消息后调用的方法
     *
     * @param messageObj
     */
    @OnMessage
    public void onMessage(String messageObj) {
    	log.info("【websocket消息】收到客户端消息:" + messageObj);

    	Message message = JSONUtil.toBean(messageObj, Message.class);
        ChatEntity chatServiceOne = chatService.getOne(new QueryWrapper<ChatEntity>().eq("id", message.getChatId()));

        message.setType(chatServiceOne.getType());
        message.setCreateTime(LocalDateTime.now());

        if(chatServiceOne.getType() == 1){
            // 私聊
            sendOneMessage(chatServiceOne.getCreaterId(), message, chatServiceOne);
            sendOneMessage(chatServiceOne.getToUser(), message, chatServiceOne);
        }
        else if(chatServiceOne.getType() == 2){
            // 群聊
            List<ChatUserEntity> list = chatUserService.list(new QueryWrapper<ChatUserEntity>().eq("chat_id", message.getChatId()).eq("status", 1));
            sendMoreMessage(list, message);
        }

        // 传递未读消息
        MessageChatList messageChatList = BeanUtil.copyProperties(message, MessageChatList.class);
        chatRecordService.setLastMessage(messageChatList);
    }

	  /** 发送错误时的处理
     * @param session
     * @param error
     */
    @OnError
    public void onError(Session session, Throwable error) {

        log.error("用户错误,原因:"+error.getMessage());
        error.printStackTrace();
    }


    // 此为广播消息
    public void sendAllMessage(String message) {
    	log.info("【websocket消息】广播消息:"+message);
        for(ChatWebSocket chatWebSocket : chatWebSockets) {
            try {
            	if(chatWebSocket.session.isOpen()) {
            		chatWebSocket.session.getAsyncRemote().sendText(message);
            	}
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    // 此为单点消息
    public void sendOneMessage(Long userId, Message message, ChatEntity chatServiceOne) {
        Session session = sessionPool.get(String.valueOf(userId));
        if (session != null) {
            if(session.isOpen()){
                try {
                    String msg = JSONUtil.toJsonStr(message);
                    log.info("【websocket消息】 单点消息:" + msg);
                    session.getAsyncRemote().sendText(msg);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            else {
                 // 消息未读
//                ChatUserEntity one = chatUserService.getOne(new QueryWrapper<ChatUserEntity>().eq("chat_id", chatServiceOne.getChatId())
//                        .eq("user_id", userId));
//                one.setUnreadCount(one.getUnreadCount() + 1);
//                chatUserService.updateById(one);
            }
            // 保存消息记录
            //chatRecordService.save(new ChatRecordEntity(chatServiceOne.getId(), userId, message.getContent()));

            // 修改为最后一条消息

        }
    }

    // 此为单点消息(多人)
    public void sendMoreMessage(List<ChatUserEntity> userList, Message message) {
        String msg = JSONUtil.toJsonStr(message);
    	for(ChatUserEntity chatUser: userList) {
    		Session session = sessionPool.get(String.valueOf(chatUser.getUserId()));
            if (session != null && session.isOpen()) {
                try {
                	log.info("【websocket消息】 单点消息（多人）:" + msg);
                    session.getAsyncRemote().sendText(msg);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
    	}
    }


}
